### How Chemicals in Everyday Products Cause Skin Allergies and How to Treat Them Many people experience allergic reactions to chemicals found in everyday products like shampoos, cosmetics, and cleaners. These reactions, known as allergic contact dermatitis, occur when your immune system overreacts to normally harmless chemicals. Even if you've used these products before without any issues, you can still develop an allergy over time. #### Common Symptoms - Redness and scaling of the skin - Itching and burning sensations - Rash that appears 24 to 48 hours after exposure, but can also start up to a week later Symptoms are usually worse in the areas that came into direct contact with the allergen. If you touch another part of your body after touching the allergen, you can spread the reaction. #### Diagnosis To diagnose a chemical allergy, your doctor will likely perform a physical exam and ask about your symptoms. They may also recommend a patch test, where small samples of chemicals are placed on your back to see if a rash develops. #### Treatment - **Avoid the Allergen:** Identify and avoid the chemical causing the reaction. - **Immediate Washing:** If you come into contact with the allergen, wash your skin with soap and water as soon as possible. - **Clothing and Jewelry:** Remove and wash any clothes or jewelry that may have come into contact with the allergen. - **Nail Care Products:** Ensure nail care products are fully dried before touching your skin. - **Over-the-Counter Medications:** For mild reactions, use calamine lotion, antihistamines, or cortisone ointments. - **See a Doctor:** For frequent or severe outbreaks, consult your doctor for prescription medications. Keeping track of your symptoms can help your doctor make an accurate diagnosis and recommend the best treatment plan for you.